From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Hopwood Subject: Re: understanding __linear_l2_table and friends Date: Mon, 25 Apr 2005 01:41:09 +0100 Message-ID: <426C3CA5.8000804@blueyonder.co.uk> References: <20050422110425.GW7715@wotan.suse.de> <20050423150827.GD7715@wotan.suse.de> <20050423151308.GA17054@ca-server1.us.oracle.com> <20050423152826.GG7715@wotan.suse.de> <20050424195522.GA13295@bytesex> Reply-To: david.nospam.hopwood@blueyonder.co.uk Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20050424195522.GA13295@bytesex> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Gerd Knorr wrote: > On Sat, Apr 23, 2005 at 05:28:26PM +0200, Andi Kleen wrote: > >>If you bought them in the last year you very likely already got them 64bit >>capable. > > That the machines are 64bit capable doesn't mean that people will > actually run 64bit software on them. Note that the very good backward > compatibility of x86_64 machines to 32bit software is one of the key > features leading to the success of the processors (lesson learned from > ia64 ;) What does that have to do with PAE support in Xen? x86_64 machines do not support PAE, and do not need it to run 32-bit applications. (A good decision by AMD, IMHO. The complexity of supporting PAE along with all the other mode combinations would have been ridiculous.) -- David Hopwood